zygodactylism

例句：

1. 1. The zookeeper noticed that the giraffe had a long toe.
   动物园管理员注意到长颈鹿有一只长脚趾。
2. 2. The scientist discovered a new species with a unique zygodactylism.
   科学家发现了一种具有独特长指畸形的新物种。
3. 3. The zoologist was fascinated by the zygodactylism of the elephants in the savannah.
   这位动物学家对撒哈拉沙漠中大象的长指畸形感到着迷。